import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/users/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import AddGoods from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'


Vue.use(Router)

const router = new Router({
  routes: [
    // 用户访问/直接跳转到login
    {path: '/',redirect:'/login'},
    // 添加路由，要访问/login地址时，我们用component属性来指定要展示的组件
    // 通过路由匹配到的组件都会通过vue-router展示出来
    {path: '/login',component: Login},
    {path: '/home',component: Home,redirect:'/welcome',
    children:[
      {path: '/welcome',component:Welcome},
      {path: '/users',component:Users},
      {path: '/rights',component:Rights},
      {path: '/roles',component:Roles},
      {path: '/categories',component:Cate},
      {path: '/params',component:Params},
      {path: '/goods',component:GoodsList},
      {path: '/goods/add',component:AddGoods},   
      {path: '/orders',component:Order}, 
      {path: '/reports',component:Report}, 
    ]
  }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to,from,next)=>{
// to将要访问的路径
// from 代表从哪个路径跳转而来
// next是一个函数，表示放行
// next()放行   next( '/login')强制跳转
  if(to.path === '/login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr)return next('/login')
  next()
})

export default router